Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d84dcea65d10bde…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 06:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f549ba6889375b4bfe10c20f3b00f3 SHA-1: b92e026c86deb80c8b305e48e8f9894674619e10 SHA-256: 9d84dcea65d10bde7beb55c02d9a4ad13a79254b71e5d689901fec8f7b6d9ab6
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Stardew Valley void mayonnaise', and also includes the malicious URL. The presence of a link farm heuristic further suggests a malicious intent to drive traffic to external sites. The file is identified as a PDF, and the heuristics indicate it's acting as a redirector.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=stardew+valley+void+mayonnaise
    • https://static.usrfiles.com/ugd/b8c837_7a9a48cdaf0d4a12b9854da07d65e756.pdf
    • https://static.usrfiles.com/ugd/b8c837_0520b94c0f5e4d7682e4512e462c7469.pdf
    • https://static.usrfiles.com/ugd/b8c837_4505f707abef4a2eba8713b00a831b7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8c9c619ac6b45a68c1f246175792e21.pdf
    • https://static.usrfiles.com/ugd/b8c837_404c24a989354ec29ef1d2ea9a374377.pdf
    • https://static.usrfiles.com/ugd/b8c837_559c4b41c27f4f1081467789baf8a2aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_610bb65e555444e9b01fc274d07c311d.pdf
    • https://static.usrfiles.com/ugd/b8c837_022441e0a6994c79b7f1fd4cfe042bb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd6e12968b1e492685f902502269d625.pdf
    • https://static.usrfiles.com/ugd/b8c837_eda7c594d0324581b93b3598a1df4084.pdf
    • https://static.usrfiles.com/ugd/b8c837_827273defede44d1b6180b8bfe373ef4.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/95205337850.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4229/files/21574896218.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23281911610.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055ae.bin
7b0e14dc14df2d78a198eeedd4ef87a8a6a9e88e68a7189fb2a75250aedf016b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AE 5328 bytes
font_01_sfnt_off000067c8.bin
c743cc744c79996d46516a36d9585c1896b3d481ff4b34081a77d64198162d49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 10228 bytes

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